• dale dougherty: we are makers
• dalia mogahed what do you think when you look at me
• dalia mogahed: the attitudes that sparked arab spring
• dambisa moyo economic growth has stalled. let's fix it
• a.j. jacobs how healthy living nearly killed me
• dame ellen macarthur the surprising thing i learned sailing solo around the world
• dame stephanie shirley why do ambitious women have flat heads
• damon horowitz philosophy in prison
• damian palin: mining minerals from seawater
• damon horowitz calls for a "moral operating system"
• dan ariely asks, are we in control of our own decisions?
• dan ariely how equal do we want the world to be you'd
• dan ariely beware conflicts of interest
• dan ariely: what makes us feel good about our work?
• dan barasch a park underneath the hustle and bustle of new york city
• dan barber: how i fell in love with a fish
• dan barber's foie gras parable
• inside america's dead shopping malls
• dan berkenstock the world is one big dataset. now, how to photograph it ... 
• dan buettner: how to live to be 100+
• meet the inventor of the electronic spreadsheet
• dan cobley: what physics taught me about marketing
• dan dennett: dangerous memes
• dan dennett: the illusion of consciousness
• dan dennett: responding to pastor rick warren
• dan gilbert: the surprising science of happiness
• dan gilbert: why we make bad decisions
• dan gross why gun violence can't be our new normal
• dan gilbert the psychology of your future self
• dan pacholke how prisons can help inmates live meaningful lives
• dan meyer: math class needs a makeover
• dan pallotta the dream we haven't dared to dream
• dan pallotta: the way we think about charity is dead wrong
• dan phillips: creative houses from reclaimed stuff
• dan pink: the puzzle of motivation
• daniel goldstein: the battle between your present and future self
• daniel goleman on compassion
• daniel h cohen for argument s sake
• daniel kahneman: the riddle of experience vs. memory
• daniel kish how i use sonar to navigate the world
• daniel kraft invents a better way to harvest bone marrow
• daniel kraft: medicine's future? there's an app for that
• daniel levitin how to stay calm when you know you'll be stressed
• daniel libeskind's 17 words of architectural inspiration
• daniel pauly: the ocean's shifting baseline
• daniel reisel the neuroscience of restorative justice
• daniel suarez: the kill decision shouldn't belong to a robot
• daniel tammet different ways of knowing
• daniel wolpert: the real reason for brains
• daniele quercia: happy maps
• danielle de niese: a flirtatious aria
• danielle feinberg the magic ingredient that brings pixar movies to life
• danit peleg forget shopping. soon you'll download your new clothes
• maps that show us who we are (not just where we are)
• danny hillis: back to the future (of 1994)
• danny hillis: the internet could crash. we need a plan b
• danny hillis: understanding cancer through proteomics
• daphne bavelier: your brain on video games
• daphne koller: what we're learning from online education
• daria van den bercken: why i take the piano on the road ... and in the air
• dave brain what a planet needs to sustain life
• dave debronkart: meet e-patient dave
• dave eggers' wish: once upon a school
• dave meslin: the antidote to apathy
• dave isay: everyone around you has a story the world needs to hear
• david agus: a new strategy in the war on cancer
• david anderson: your brain is more than a bag of chemicals
• will automation take away all our jobs?
• dave troy: social maps that reveal a city's intersections—and separations
• david binder: the arts festival revolution
• david bismark: e-voting without fraud
• david blaine: how i held my breath for 17 min
• david bolinsky: visualizing the wonder of a living cell
• david brooks the social animal
• david brooks should you live for your résumé ... or your eulogy
• david byrne: how architecture helped music evolve
• why you should know how much your coworkers get paid
• david byrne sings "(nothing but) flowers"
• why helmets don't prevent concussions—and what might
• david cameron: the next age of government
• a doctor's case for medical marijuana
• david carson on design + discovery
• david chalmers how do you explain consciousness
• david christian big history
• david deutsch: chemical scum that dream of distant quasars
• david deutsch: a new way to explain explanation
• david eagleman: can we create new senses for humans?
• david epstein are athletes really getting faster, better, stronger
• david gallo on life in the deep oceans
• david gallo: underwater astonishments
• david grady: how to save the world (or at least yourself) from bad meetings
• david griffin: how photography connects us
• david gruber glow-in-the-dark sharks and other stunning sea creatures
• david hanson: robots that "show emotion"
• david hoffman shares his sputnik mania
• david hoffman on losing everything
• david holt plays mountain music
• david keith's unusual climate change idea
• david kelley: how to build your creative confidence
• david kelley on human-centered design
• david kwong two nerdy obsessions meet—and it's magic
• a.j. jacobs how healthy living nearly killed me
• david logan: tribal leadership
• david macaulay's rome antics
• david mackay: a reality check on renewables
• david mccandless: the beauty of data visualization
• the refugee crisis is a test of our character
• david perry: are games better than life?
• david pizarro: the strange politics of disgust
• david pogue: 10 top time-saving tech tips
• david pogue on cool phone tricks
• david pogue on the music wars
• david pogue: simplicity sells
• david puttnam does the media have a duty of care
• david r. dow: lessons from death row inmates
• how racism makes us sick
• david rockwell builds at ground zero
• david rothkopf how fear drives american politics
• david sedlak 4 ways we can avoid a catastrophic drought
• david sengeh the sore problem of prosthetic limbs
• a.j. jacobs how healthy living nearly killed me
• david steindl-rast want to be happy be grateful
• david s. rose on pitching to vcs
• dawn landes a song for my hero, the woman who rowed into a hurricane
• dean kamen on inventing and giving
• dean kamen previews a new prosthetic arm
• dean kamen: the emotion behind invention
• dean ornish: healing through diet
• dean ornish: your genes are not your fate
• dean ornish: the world's killer diet
• deb roy the birth of a word
• debate: does the world need nuclear energy?
• deborah gordon: the emergent genius of ant colonies
• deborah gordon what ants teach us about the brain, cancer and the internet
• deborah rhodes: a tool that finds 3x more breast tumors, and why it's not available to you
• behind the lies of holocaust denial
• deborah scranton on her "war tapes"
• debra jarvis: yes, i survived cancer. but that doesn't define me
• dee boersma: pay attention to penguins
• a young scientist's quest for clean water
• what we don't know about europe's muslim kids
• del harvey the strangeness of scale at twitter
• clay shirky: why sopa is a bad idea
• how students of color confront impostor syndrome
• denis dutton: a darwinian theory of beauty
• denise herzing: could we speak the language of dolphins?
• dennis hong making a car for blind drivers
• dennis hong: my seven species of robot
• dennis vanengelsdorp: a plea for bees
• derek paravicini and adam ockelford in the key of genius
• derek sivers: how to start a movement
• derek sivers: keep your goals to yourself
• derek sivers: weird, or just different?
• devdutt pattanaik: east vs. west—the myths that mystify
• diana laufenberg: how to learn? from mistakes
• a.j. jacobs how healthy living nearly killed me
• diana nyad: extreme swimming with the world's most dangerous jellyfish
• diana nyad never, ever give up
• diane kelly: what we didn't know about penis anatomy
• dianna cohen: tough truths about plastic pollution
• didier sornette how we can predict the next financial crisis
• a.j. jacobs how healthy living nearly killed me
• di¨¦b¨¦do francis k¨¦r¨¦ how to build with clay ... and community
• dilip ratha: the hidden force in global economics: sending money home
• don levy: a cinematic journey through visual effects
• dimitar sasselov: how we found hundreds of potential earth-like planets
• don norman: 3 ways good design makes you happy
• don tapscott: four principles for the open world
• don tapscott how the blockchain is changing money and business
• donald hoffman do we see reality as it is
• a.j. jacobs how healthy living nearly killed me
• donald sadoway: the missing link to renewable energy
• dong woo jang the art of bow-making
• doris kearns goodwin on learning from past presidents
• dorothy roberts the problem with race-based medicine
• doris kim sung: metal that breathes
• dr. seyi oyesola tours a hospital in nigeria
• drew berry: animations of unseeable biology
• drew dudley: everyday leadership
• drew curtis: how i beat a patent troll
• dyan denapoli: the great penguin rescue
• dustin yellin a journey through the mind of an artist